Its very different to press a log. Usually the log have 12inches diameter , so when you clean it , you became short of breath. Its a very different technique. But usually if you have a heavy clean press you can heavy log press.

I find its easier to push an axel overhead than a log at the same weight. And easier with an olympic bar.Look at the video I axel 305 on the first axel and 315 on the second and its easier than the 295 log i press...

Log is much more difficult when you first start using it, no doubt. When I started the log, I had trouble with 220 but could do a 275 oly bar.

Now I can do nearly the same on each. I have gotten 345 on a bar and 320 on log press. The log keeps getting easier for me and I should probably max out again.

For me, the log gets easier because I cannot get a bar to touch my shoulders, while the log sits perfectly in front of me.

Many people will never log press what they press on an axle or bar. It throws you off balance and is much harder to push your head through at lockout. Also, with the size of the log, it hangs the weight farther in front of you and is harder to jerk for this reason.

Thanks for the replies guys...so from the sounds of things if you never train on a log, just on a bar and enter a contest with that as an event I will probably embarass myself

Not completely. I used DB's with neutral grip for standing OHP for a while to simulate the log. The important part of simulating the movement is to LOCKOUT. This is where most people will have a hard time, just because they have never stabilized a weight, with that grip, extended completely overhead. Try it with DB's; it wont teach you the clean, but that part comes pretty naturally....until you try a max weight anyway. Good luck!